I've done many frags before and all you do is cut with a good pair of scissors or a razor blade, you want to make sure you get a frag that looks like a minature size of the main coral. Then take a toothpick and stick it through the stock of the frag, then take a small rock and some elastics, you have to then wrap the elastics around the toothpicks and the rock so that the bottom of the frag is touching the rock, then you just set it somewheres in the tank and leave it for a week or so or until it attaches to the rock.